Function ImFontAtlas_AddCustomRectFontGlyph

pub unsafe extern "C" fn ImFontAtlas_AddCustomRectFontGlyph(
    self_: *mut ImFontAtlas,
    font: *mut ImFont,
    id: u16,
    width: i32,
    height: i32,
    advance_x: f32,
    offset: ImVec2,
) -> i32